/*
   Copyright (c) 2011, 2012 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-18 Marco Riccardi - initial implementation
 *  2012-04-06 Marco Riccardi - added message in DliParseException
 *
 */
package org.mizartools.dli;

import java.util.LinkedList;

public class Predicate extends ItemDefinition {

    private LinkedList<Locus> locusList = new LinkedList<Locus>();
    private Properties properties = null;
    private Redefinition redefinition = null;

    private Predicate(){
		super(null);
	}
    
    public Predicate(LinkedList<Locus> locusList, Properties properties, Redefinition redefinition) throws DliException {
    	super(null);
		if (locusList == null){
			throw new DliException();
		}
		this.locusList = locusList;
		this.properties = properties;
		this.redefinition = redefinition;
    }

	public static Predicate newInstance(String string) throws DliParseException {
		Predicate predicate = new Predicate();
		if (string.equals("pred()")){
			return predicate;
		}
		int position = string.indexOf("(");
		if (position == -1) {
			throw new DliParseException("["+string+"] is not valid in Predicate");
		}
		if (!string.substring(0, position).equals("pred")){
			throw new DliParseException("["+string+"] is not valid in Predicate");
		}
		string = string.substring(position+1, string.length()-1);
		int positionComma = Utility.searchSeparationComma(string);
		while (positionComma != -1) {
			position = string.indexOf("(");
			if (position == -1) {
				throw new DliParseException("["+string+"] is not valid in Predicate");
			}
			if (string.substring(0, position).equals("$locus")){
				predicate.locusList.add(Locus.newInstance(string.substring(0, positionComma)));
			}
			if (string.substring(0, position).equals("$properties")){
				predicate.properties = Properties.newInstance(string.substring(0, positionComma));
			}
			if (string.substring(0, position).equals("$redefinition")){
				predicate.redefinition = Redefinition.newInstance(string.substring(0, positionComma));
			}
			string = string.substring(positionComma+1, string.length());
			positionComma = Utility.searchSeparationComma(string);
		}
		position = string.indexOf("(");
		if (position == -1) {
			throw new DliParseException("["+string+"] is not valid in Predicate");
		}
		if (string.substring(0, position).equals("$locus")){
			predicate.locusList.add(Locus.newInstance(string));
		}
		if (string.substring(0, position).equals("$properties")){
			predicate.properties = Properties.newInstance(string);
		}
		if (string.substring(0, position).equals("$redefinition")){
			predicate.redefinition = Redefinition.newInstance(string);
		}
		return predicate;
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("pred(");
		boolean first = true;
		for (Locus locus : locusList){
			if (first) first = false;
			else sb.append(",");
			sb.append(locus.toString());
		}
		if (properties != null){
			sb.append(",");
			sb.append(properties.toString());
		}
		if (redefinition != null){
			sb.append(",");
			sb.append(redefinition.toString());
		}
		sb.append(")");
		return sb.toString();
	}
	
}
